environment selfpurification环境: environment; surroundings; c ...自: self; oneself; one's own净: clean作用: act on; affect环境自净: environment self-purification下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:环境自净作用，即可在微信中查询翻译
